As most of the U.S. turned to the sky today to watch the first total solar eclipse in decades, Tesla (TSLA) CEO Elon Musk joined in -- but in his own unique fashion, the billionaire CEO posted on Twitter (TWTR) .

Watching eclipse with sunglasses on through the Model S glass roof. Wow!

— Elon Musk (@elonmusk) August 21, 2017

Musk donned glasses and looked up, just like us. But for him, the venue was a $79,000 electric vehicle instead of the local public park.

One follower asked if Musk was on autopilot, which Musk gladly affirmed. 

Yes :)

— Elon Musk (@elonmusk) August 21, 2017

Tesla has used the total solar eclipse as a marketing opportunity, pushing its Powerwall 2 battery. The product is designed to store energy generated by solar panels and provide backup power during outages or natural disasters.

Although the eclipse darkened skies, no major power outages occurred. But Tesla wouldn't be Tesla if it passed up the opportunity to promote its solar power and home energy product line.

Eclipse ready pic.twitter.com/clhB7nyw1l

— Tesla (@TeslaMotors) August 21, 2017
Tesla stock traded down 3.5% in late-afternoon trading to $335.27.

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